remove old workaround for replicating from old

MySQL 5.1 and 5.2 alpha trees.

mysql-test/suite/binlog/r/binlog_old_versions.result

@@ -38,21 +38,6 @@ SELECT COUNT(*) FROM t3;
 COUNT(*)
 17920
 DROP TABLE t1, t3;
-==== Read binlog from alcatel tree (mysql-5.1-wl2325-5.0-drop6) ====
-SELECT * FROM t1 ORDER BY a;
-a	b
-0	last_insert_id
-1	one
-3	last stm in trx: next event should be xid
-4	four
-781729	random
-SELECT * FROM t2 ORDER BY a;
-a	b
-3	first stm in trx
-SELECT COUNT(*) FROM t3;
-COUNT(*)
-17920
-DROP TABLE t1, t2, t3;
 ==== Read binlog from ndb tree (mysql-5.1-telco-6.1) ====
 SELECT * FROM t1 ORDER BY a;
 a	b

mysql-test/suite/binlog/t/binlog_old_versions.test

@@ -64,25 +64,6 @@ SELECT COUNT(*) FROM t3;
 DROP TABLE t1, t3;
 
 
---echo ==== Read binlog from alcatel tree (mysql-5.1-wl2325-5.0-drop6) ====
-
-# In this version, it was not possible to switch between row-based and
-# statement-based binlogging without restarting the server.  So, we
-# have two binlogs; one for row based and one for statement based
-# replication.
-
-# Read rbr binlog.
---exec $MYSQL_BINLOG --local-load=$MYSQLTEST_VARDIR/tmp/ suite/binlog/std_data/ver_5_1-wl2325_r.001 | $MYSQL --local-infile=1
-# Read stm binlog.
---exec $MYSQL_BINLOG --local-load=$MYSQLTEST_VARDIR/tmp/ suite/binlog/std_data/ver_5_1-wl2325_s.001 | $MYSQL --local-infile=1
-# Show result.
-SELECT * FROM t1 ORDER BY a;
-SELECT * FROM t2 ORDER BY a;
-SELECT COUNT(*) FROM t3;
-# Reset.
-DROP TABLE t1, t2, t3;
-
-
 --echo ==== Read binlog from ndb tree (mysql-5.1-telco-6.1) ====
 
 # Read binlog.

sql/log_event.cc

@@ -4568,109 +4568,6 @@ Format_description_log_event(const char* buf,
     checksum_alg= (uint8) BINLOG_CHECKSUM_ALG_UNDEF;
   }
 
-  /*
-    In some previous versions, the events were given other event type
-    id numbers than in the present version. When replicating from such
-    a version, we therefore set up an array that maps those id numbers
-    to the id numbers of the present server.
-
-    If post_header_len is null, it means malloc failed, and is_valid
-    will fail, so there is no need to do anything.
-
-    The trees in which events have wrong id's are:
-
-    mysql-5.1-wl1012.old mysql-5.1-wl2325-5.0-drop6p13-alpha
-    mysql-5.1-wl2325-5.0-drop6 mysql-5.1-wl2325-5.0
-    mysql-5.1-wl2325-no-dd
-
-    (this was found by grepping for two lines in sequence where the
-    first matches "FORMAT_DESCRIPTION_EVENT," and the second matches
-    "TABLE_MAP_EVENT," in log_event.h in all trees)
-
-    In these trees, the following server_versions existed since
-    TABLE_MAP_EVENT was introduced:
-
-    5.1.1-a_drop5p3   5.1.1-a_drop5p4        5.1.1-alpha
-    5.1.2-a_drop5p10  5.1.2-a_drop5p11       5.1.2-a_drop5p12
-    5.1.2-a_drop5p13  5.1.2-a_drop5p14       5.1.2-a_drop5p15
-    5.1.2-a_drop5p16  5.1.2-a_drop5p16b      5.1.2-a_drop5p16c
-    5.1.2-a_drop5p17  5.1.2-a_drop5p4        5.1.2-a_drop5p5
-    5.1.2-a_drop5p6   5.1.2-a_drop5p7        5.1.2-a_drop5p8
-    5.1.2-a_drop5p9   5.1.3-a_drop5p17       5.1.3-a_drop5p17b
-    5.1.3-a_drop5p17c 5.1.4-a_drop5p18       5.1.4-a_drop5p19
-    5.1.4-a_drop5p20  5.1.4-a_drop6p0        5.1.4-a_drop6p1
-    5.1.4-a_drop6p2   5.1.5-a_drop5p20       5.2.0-a_drop6p3
-    5.2.0-a_drop6p4   5.2.0-a_drop6p5        5.2.0-a_drop6p6
-    5.2.1-a_drop6p10  5.2.1-a_drop6p11       5.2.1-a_drop6p12
-    5.2.1-a_drop6p6   5.2.1-a_drop6p7        5.2.1-a_drop6p8
-    5.2.2-a_drop6p13  5.2.2-a_drop6p13-alpha 5.2.2-a_drop6p13b
-    5.2.2-a_drop6p13c
-
-    (this was found by grepping for "mysql," in all historical
-    versions of configure.in in the trees listed above).
-
-    There are 5.1.1-alpha versions that use the new event id's, so we
-    do not test that version string.  So replication from 5.1.1-alpha
-    with the other event id's to a new version does not work.
-    Moreover, we can safely ignore the part after drop[56].  This
-    allows us to simplify the big list above to the following regexes:
-
-    5\.1\.[1-5]-a_drop5.*
-    5\.1\.4-a_drop6.*
-    5\.2\.[0-2]-a_drop6.*
-
-    This is what we test for in the 'if' below.
-  */
-  if (post_header_len &&
-      server_version[0] == '5' && server_version[1] == '.' &&
-      server_version[3] == '.' &&
-      strncmp(server_version + 5, "-a_drop", 7) == 0 &&
-      ((server_version[2] == '1' &&
-        server_version[4] >= '1' && server_version[4] <= '5' &&
-        server_version[12] == '5') ||
-       (server_version[2] == '1' &&
-        server_version[4] == '4' &&
-        server_version[12] == '6') ||
-       (server_version[2] == '2' &&
-        server_version[4] >= '0' && server_version[4] <= '2' &&
-        server_version[12] == '6')))
-  {
-    if (number_of_event_types != 22)
-    {
-      DBUG_PRINT("info", (" number_of_event_types=%d",
-                          number_of_event_types));
-      /* this makes is_valid() return false. */
-      my_free(post_header_len);
-      post_header_len= NULL;
-      DBUG_VOID_RETURN;
-    }
-    static const uint8 perm[23]=
-      {
-        UNKNOWN_EVENT, START_EVENT_V3, QUERY_EVENT, STOP_EVENT, ROTATE_EVENT,
-        INTVAR_EVENT, LOAD_EVENT, SLAVE_EVENT, CREATE_FILE_EVENT,
-        APPEND_BLOCK_EVENT, EXEC_LOAD_EVENT, DELETE_FILE_EVENT,
-        NEW_LOAD_EVENT,
-        RAND_EVENT, USER_VAR_EVENT,
-        FORMAT_DESCRIPTION_EVENT,
-        TABLE_MAP_EVENT,
-        PRE_GA_WRITE_ROWS_EVENT,
-        PRE_GA_UPDATE_ROWS_EVENT,
-        PRE_GA_DELETE_ROWS_EVENT,
-        XID_EVENT,
-        BEGIN_LOAD_QUERY_EVENT,
-        EXECUTE_LOAD_QUERY_EVENT,
-      };
-    event_type_permutation= perm;
-    /*
-      Since we use (permuted) event id's to index the post_header_len
-      array, we need to permute the post_header_len array too.
-    */
-    uint8 post_header_len_temp[23];
-    for (int i= 1; i < 23; i++)
-      post_header_len_temp[perm[i] - 1]= post_header_len[i - 1];
-    for (int i= 0; i < 22; i++)
-      post_header_len[i] = post_header_len_temp[i];
-  }
   DBUG_VOID_RETURN;
 }